This Winchester manufactured fourth variation breech bolt sleeve assembly is for the later pre-64 model 70 bolt action rifle and is in very good condition with light wear. This assembly consists of the fourth variation breech bolt sleeve, sleeve lock assembly, fourth variation safety lock assembly and the firing pin stop screw.  (file photo)

Note: Winchester pre-64 model 70 bolt action rifles with the following serial numbers have been observed with this part: 195041, 411127, 424218, 476196 & 576216.